JP3975238B2 - Locking device for lid of underground structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lid locking device for underground structures, and is used for manholes, CC boxes, and the like.
[0002]
[Prior art]
The locking means in this type of lid locking device is usually operated with an operation tool to latch the lid in the closed state with respect to the frame or release the latch.
[0003]
[Problems to be solved by the invention]
However, in such a conventional locking means, it is considered that the operation tool is removed for the sake of convenience after the operation is completed, so it is difficult to determine whether or not the manhole cover is locked at first glance. Some have had the inconvenience of forgetting to lock.
[0004]
An object of the present invention is to eliminate the inconvenience.
[0005]
[Means for Solving the Problems]
In order to achieve this object, an underground structure lid locking device according to the present invention comprises an underground structure frame and a lid attached to the frame so as to be openable and closable. A cylindrical hole is formed on the surface of the body, and a shaft hole is formed at the bottom of the cylindrical hole. An operation shaft is rotatably inserted into the shaft hole, and a locking tool is fixed to the back side of the lid body on the operation shaft. Then, a locking lever is projected from the locking tool, and the operating shaft is rotated via the operating tool to lock or release the locking lever with respect to the frame body. In the lid locking device for an underground structure that can be mounted, the operation tool has a shaft hole, and is fitted into the head of the operation shaft in a non-rotatable manner along the shaft hole. A hole and an operation hole into which a wrench is inserted, and a retaining protrusion on the outer peripheral edge of the insertion hole And an inward flange is formed on the inner peripheral edge of the opening of the cylindrical hole, and a notch is provided in the inward flange, and the retaining projection of the operation tool passes through the notch of the inward flange. And is configured to be able to penetrate into the cylindrical hole and to be unable to be removed when the retaining projection is positioned below the inward flange by rotating in the cylindrical hole, and the locking lever is A notch is provided in the inward flange so that the operation tool can enter the cylindrical hole when latched with respect to the frame and cannot be removed when the latched state is released. because provided, the operator, which can be due to the presence of protruding operating member, determines the state in which locking is released over the locking lever relative to the cover A.
[0006]
In this case, the retaining protrusions and the locking lever to lever so as to protrude in the same direction, since the apparent position of the long as the locking lever watching the position of the retaining projection of the operation tool, the lid The locked or unlocked state can be easily determined.
[0007]
The underground structure lid locking device according to the present invention includes an underground structure frame and a lid attached to the frame so as to be openable and closable, and a cylindrical hole is formed on the surface of the lid. And a shaft hole is formed at the bottom of the cylindrical hole, an operation shaft is rotatably inserted into the shaft hole, and a locking tool is fixed to the back side of the lid body on the operation shaft. A lid for an underground structure that can be latched on or released from the frame by rotating the operating shaft by projecting a latching lever on the frame. A locking flange is provided on the inner wall surface of the frame body, a locking projection is provided on the locking tool, and a lower peripheral end surface of the locking projection is provided on the supporting flange when the operation shaft rotates. contact, and, the lower end peripheral surface of the Kakaritome突 cause the said locking lever For you seem to fall toward the locking direction inclined, in accordance with the rotation of said operating shaft, wherein the cover member by cam action between the support flange and the locking projection is a result of vertical movement of the locking lever When the locked state is released, it is lifted upward, and as a result, the unlocked state of the lid becomes clear.
[0008]
A stopper is provided on the back side of the lid, and a locking projection is provided on the locking tool. By rotating the operation shaft, the locking projection can collide with the stopper, and with respect to the operation shaft. lever projecting the locking projection in a direction opposite to said locking lever, in which easier to remove the work of the lid from the frame for which can fix the unlocked state of the locking lever.
[0009]
Further, the locking projections have cut-out of the inward flange is provided in the cylinder bore so that the operating member is not possible extraction when colliding with the stopper lever, the unlocked state of the locking lever Then, since the operation tool cannot be extracted from the cylindrical hole, it is possible to clearly determine a state in which the latch of the latch lever with respect to the lid is released.
[0010]
In addition, a stopper is provided on the back side of the lid, and a locking projection is provided on the locking tool. By rotating the operation shaft, the locking projection can collide with the stopper, and the operation shaft is lever projecting the locking projection in a direction opposite to the locking lever, when the locking projection collides with the stopper, because such a state that the locking lever is released from the frame, stabilize the state of the release Can be maintained.
[0011]
In addition, when the locking protrusion collides with the stopper, the downward inclination of the locking protrusion is positioned at the lowest position, so that the lid is raised most when the locking lever is released. Since it becomes a state, the unlocking state of the lid is further clarified.
[0012]
In addition, if a protective cover is provided on the back side of the lid and the protective cover covers the locking lever, the protruding portion such as the locking lever is not exposed. It does not break itself or damage the road surface.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
1 is a sectional view of a locked state of a first embodiment of a lid locking device for an underground structure according to the present invention, FIG. 2 is a diagram showing a principal part of an enlarged section taken along line II-II in FIG. 1, and FIG. FIG. 4 is a sectional view of the operating tool in FIG. 1, taken along the arrow III, FIG. 4 is a sectional view in the unlocked state, FIG. 5 is a diagram showing the main part of the VV line enlarged section in FIG. FIG. 7 is an enlarged view taken along the line VII-- without the operation tool in FIG. 6, FIG. 8 is a view taken along the line VIII in FIG. 6, and FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG. is there.
[0014]
A first embodiment will be described with reference to FIGS.
[0015]
In FIGS. 1 and 4, 10 is a cylindrical frame body of a manhole (corresponding to the “underground structure” of the present invention) M, and 20 is a cover body. Both are manufactured by casting.
[0016]
Reference numeral 11 denotes an annular substrate, which is formed integrally with the peripheral edge of the lower end of the cylindrical frame 10. The cylindrical frame body 10 is placed on the opening end of the manhole through the annular substrate 11, and is fixed by appropriate means. Reference numeral 12 denotes a support flange that protrudes from the inner wall surface of the cylindrical frame 10. The support flange 12 is for supporting the lid 20 (when closed). Reference numeral 13 denotes a stopper, which protrudes from the lid 20. The function of this stopper 13 will be described later.
[0017]
Next, reference numeral 21 denotes a pedestal that protrudes from the surface corner of the lid 20. The base 21 is integrally cast when the lid 20 is cast. Reference numeral 22 denotes a cylindrical hole, which is formed on the base portion 21 (see FIGS. 1 and 4). The cylindrical hole 22 opens upward. Reference numeral 23 denotes an inward flange 23, which is formed on the inner periphery of the opening of the cylindrical hole 22. The inward flange 23 has a notch 231. The functions of the inward flange 23 and the notch 231 will be described later.
[0018]
A shaft hole 24 is formed at the bottom of the cylindrical hole 22 in the platform 21 and penetrates the lid 20. Reference numeral 31 denotes an operation shaft, which is rotatably inserted into the shaft hole 24 via a washer 26. The operation shaft 31 has a bolt shape, and its head 311 is formed in an equilateral triangle shape with curved corners.
[0019]
Reference numeral 32 denotes a locking tool, which is fastened to the projecting portion of the operation shaft 31 with bolts and nuts. Therefore, the locking tool 32 rotates with the operation shaft 31. Reference numeral 321 denotes a locking lever that protrudes from the locking tool 32. When the locking lever 321 is positioned below the support flange 12, the lid 20 is in a locked state (see FIG. 1), and when the lever is moved from below the support flange 12, the locked state is released. The Reference numeral 322 denotes a locking protrusion, which protrudes from the locking tool 32. The locking projection 322 contacts the stopper 13 when the operation shaft 31 rotates, thereby preventing the locking lever 321 from rotating in one direction (see FIG. 4). The index 312 on the head 311 of the operation shaft 31 indicates the direction in which the locking lever 321 is positioned (see FIG. 2).
[0020]
Reference numeral 28 denotes a protective cover, which is provided on the back side of the lid 20 so as to cover the locking lever 321 .
[0021]
Further, the shaft hole 24, the operation shaft 31, the locking tool 32, and the locking lever 321 constitute the “locking means” of the present invention.
[0022]
Next, the operation method of this locking device will be described.
[0023]
In the figure, reference numeral 50 denotes an operating tool, which has a shaft hole 51. Reference numeral 52 denotes a lower end fitting insertion hole, which is formed at the lower end portion of the shaft hole 51. The lower end insertion hole 52 has a substantially triangular cross section, and can be inserted into the head 311 of the operation shaft 31 in a non-rotatable manner. Reference numeral 521 denotes a retaining protrusion, which is installed on the outer peripheral edge of the lower end fitting hole 52. The function of the retaining protrusion 521 will be described later. Reference numeral 53 denotes an upper end insertion hole, which is formed at the upper end portion of the shaft hole 51. The upper end insertion hole 53 also has a substantially triangular cross section, but its inner diameter (inscribed circle) is smaller than the lower end insertion hole 52. It is applied to the head of the operation shaft in the conventional locking device. An operation hole 54 is formed between the lower end insertion hole 52 and the upper end insertion hole 53 in the shaft hole 51. The operation hole 54 has a substantially hexagonal cross section so that a hexagon wrench can be inserted in a non-rotatable manner.
[0024]
When operating the locking device using the operation tool 50 configured as described above, first, when the lid 20 is in a locked state (the state shown in FIG. 1), the lower end insertion hole 52 of the operation tool 50 is provided in the The crown is inserted into the head 311 of the operation shaft 31 in the cylindrical hole 22 (state shown in FIG. 2). At this time, the retaining protrusion 521 of the operation tool 50 passes through the notch 231 of the inward flange 23 in the cylindrical hole 22. In this state, a hexagon wrench (not shown) is inserted into the operation hole 54 of the operation tool 50 and rotated about the axis. Then, the operating shaft 31, and thus the locking tool 32, rotate, the locking lever 321 is released from below the support flange 12, and the locked state of the lid 20 is released (see FIGS. 4 and 5). thing). At this time, since the retaining protrusion 521 of the operation tool 50 is positioned below the inward flange 23 in the cylindrical hole 22, the operation tool 50 is the head of the cylindrical hole 22, and thus the operation shaft 31. It is impossible to extract from 311. In other words, the operation tool 50 can be removed from the cylindrical hole 22 and thus from the head 311 of the operation shaft 31 only when the lid 20 is in the locked state.
[0025]
Note that the narrow grooves 531 and 531 are provided in the axial direction in the upper end insertion hole 53 of the locking tool 50 when the lower end insertion hole 52 is operated. A hexagonal wrench with a diameter larger than that of a circle) can be used. In this case, it is necessary to match the sectional shape of the operation hole 54 with the hexagon wrench.
[0026]
Next, a second embodiment will be described based on FIGS.
[0027]
In the second embodiment, the inward flange 23 of the cylindrical hole 22 in the first embodiment is eliminated, and instead, semicircular shelf plates 29, 29 are formed on both sides via a predetermined interval. For this reason, the opening of the cylindrical hole 22 has a substantially rectangular shape (see FIG. 7). Further, as shown in FIGS. 6 and 9, in the operation tool 60, the fitting insertion portion 61 has a rectangular shape (in plan view), and an operation handle 62 is extended on the upper surface thereof.
[0028]
Then, when the lid 20 is in the locked state (the state shown in FIG. 6), the crown insertion hole 611 of the fitting insertion portion 61 in the operation tool 60 is inserted into the head 311 of the operation shaft 31 in the cylindrical hole 22. At this time, the insertion part 61 of the operation tool 60 is inserted along the long side thereof along the shelf plates 29 and 29 in the cylindrical hole 22. In this state, the operation handle 62 of the operation tool 60 is rotated (see the arrow direction in FIG. 7). Then, the operation shaft 31 and, consequently, the locking tool 32 rotate (see the arrow direction in FIG. 8), the locking lever 321 is released from below the support flange 12, and the locked state of the lid 20 is released. Is done. At this time, since both end portions (on the long side) of the fitting insertion portion 61 of the operation tool 60 are located below the shelf plates 29 and 29 in the columnar hole 22, the operation tool 60 is disposed in the columnar hole. 22. As a result, it can not be extracted from the head 311 of the operation shaft 31. That is, the operation tool 60 can be extracted from the cylindrical hole 22 and thus the head 311 of the operation shaft 31 only when the lid 20 is in a locked state. When the lid 20 is in a locked state, a cap is inserted and inserted so that sand, rainwater, etc. do not enter the cylindrical hole 22.
[0029]
【The invention's effect】
In order to achieve this object, an underground structure lid locking device according to the present invention comprises an underground structure frame and a lid attached to the frame so as to be openable and closable. A cylindrical hole is formed on the surface of the body, and a shaft hole is formed at the bottom of the cylindrical hole. An operation shaft is rotatably inserted into the shaft hole, and a locking tool is fixed to the back side of the lid body on the operation shaft. Then, a locking lever is projected from the locking tool, and the operating shaft is rotated via the operating tool to lock or release the locking lever with respect to the frame body. In the lid locking device for an underground structure that can be mounted, the operation tool has a shaft hole, and is fitted into the head of the operation shaft in a non-rotatable manner along the shaft hole. A hole and an operation hole into which a wrench is inserted, and a retaining protrusion on the outer peripheral edge of the insertion hole And an inward flange is formed on the inner peripheral edge of the opening of the cylindrical hole, and a notch is provided in the inward flange, and the retaining projection of the operation tool passes through the notch of the inward flange. And is configured to be able to penetrate into the cylindrical hole and to be unable to be removed when the retaining projection is positioned below the inward flange by rotating in the cylindrical hole, and the locking lever is A notch is provided in the inward flange so that the operation tool can enter the cylindrical hole when latched with respect to the frame and cannot be removed when the latched state is released. because provided, the operator, which can be due to the presence of protruding operating member, determines the state in which locking is released over the locking lever relative to the cover A.
[0030]
Therefore, if this underground structure lid locking device is used, it is possible to easily prevent forgetting to lock the frame of the lid such as a manhole.
[0031]
In this case, the retaining protrusions and the locking lever to lever so as to protrude to the same direction, since the apparent position of the long as the locking lever watching the position of the retaining projection of the operation tool, the lid The locked or unlocked state can be easily determined.
[0032]
The underground structure lid locking device according to the present invention includes an underground structure frame and a lid attached to the frame so as to be openable and closable, and a cylindrical hole is formed on the surface of the lid. And a shaft hole is formed at the bottom of the cylindrical hole, an operation shaft is rotatably inserted into the shaft hole, and a locking tool is fixed to the back side of the lid body on the operation shaft. A lid for an underground structure that can be latched on or released from the frame by rotating the operating shaft by projecting a latching lever on the frame. A locking flange is provided on the inner wall surface of the frame body, a locking projection is provided on the locking tool, and a lower peripheral end surface of the locking projection is provided on the supporting flange when the operation shaft rotates. The lower end peripheral surface of the locking projection is in contact with the locking lever. For you seem to fall toward the locking direction inclined, in accordance with the rotation of said operating shaft, wherein the cover member by cam action between the support flange and the locking projection is a result of vertical movement of the locking lever When the locked state is released, it is lifted upward, and as a result, the unlocked state of the lid becomes clear.
[0033]
A stopper is provided on the back side of the lid, and a locking projection is provided on the locking tool. By rotating the operation shaft, the locking projection can come into contact with the stopper, and the operation shaft is lever projecting the locking projection in a direction opposite to said locking lever, in which easier to remove the work of the lid from the frame for which can fix the unlocked state of the locking lever.
[0034]
Further, the locking projections have cut-out of the inward flange is provided in the cylinder bore so that the operating member is not possible extraction when contacted with the stopper lever, the unlocked state of the locking lever Then, since the operation tool cannot be extracted from the cylindrical hole, it is possible to clearly determine a state in which the latch of the latch lever with respect to the lid is released.
[0035]
In addition, a stopper is provided on the back side of the lid, and a locking projection is provided on the locking tool. By rotating the operation shaft, the locking projection can be brought into contact with the stopper and the operation shaft can be rotated. lever projecting the locking projection in a direction opposite to the locking lever, when the locking projection is in contact with the stopper, because such a state that the locking lever is released from the frame, stabilize the state of the release Can be maintained.
[0036]
Further, if the locking protrusion is positioned at the lowest position when the locking protrusion comes into contact with the stopper, the lid is raised most when the locking lever is released. Since it becomes a state, the unlocking state of the lid is further clarified.
[0037]
Further, if a protective cover is provided on the back side of the lid and the protective cover covers the locking lever, the protruding portion such as the locking lever is not exposed. It does not break itself or damage the road surface.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a locked state of a first embodiment in a lid locking device for an underground structure according to the present invention.
FIG. 2 is a diagram showing a main part of an enlarged section taken along line II-II in FIG.
3 is a view taken along the arrow III of the operation tool in FIG. 1. FIG.
FIG. 4 is a sectional view of the unlocked state.
5 is a diagram showing a main part of an enlarged cross section taken along the line V-V in FIG. 4;
FIG. 6 is a cross-sectional view of the second embodiment in a locked state.
7 is an enlarged view taken along arrow VII in a state excluding the operation tool in FIG. 6;
8 is a view taken along arrow VIII in FIG. 6;
9 is a cross-sectional view taken along the line IX-IX in FIG.
[Explanation of symbols]
M ... Manhole (underground structure)
10 ... Cylindrical frame (frame)
20… Lid
22… Cylinder hole
23… Inward flange
231 … Notch
24… Shaft hole (locking means)
29 … Defense cover
31… Operation shaft (locking means)
32… Locking device (locking means)
321… Locking lever (locking means)
50… Operation tool (operation tool)
52 ... the lower end insertion hole (insertion hole)
53 … top end insertion hole (insertion hole )
54 … Operation hole
521 … Retaining protrusion
60… Operation tool (operation tool)

Claims (8)

A frame of an underground structure and a lid attached to the frame so as to be openable and closable. A cylindrical hole is formed on a surface of the lid, and a shaft hole is formed at a bottom of the cylindrical hole. An operating shaft is rotatably inserted in the hole, a locking tool is fixed to the back side of the lid body on the operating shaft, a locking lever is projected from the locking tool, and the operating shaft is inserted through the operating tool. or latched to the locking lever to the frame body by rotating in the lid locking device of the underground structure can the child or releasing the latching, the operation member is a shaft hole And has an insertion hole that is inserted into the head of the operation shaft in a non-rotatable manner along the shaft hole, and an operation hole into which a wrench is inserted, and is prevented from coming off at the outer peripheral edge of the insertion hole. Protrusions are provided and an inward flange is formed on the inner periphery of the opening of the cylindrical hole. A notch portion of the flange is provided, and the operating tool can enter the cylindrical hole by passing through the notch portion of the inward flange and rotate in the cylindrical hole so that the retaining projection is It is configured so that it cannot be pulled out when positioned below the inward flange, and the operation tool can enter the cylindrical hole when the locking lever is in a latched state with respect to the frame. And a notch portion is provided in the inward flange so that it cannot be removed when the latched state is released. 2. The lid locking device for an underground structure according to claim 1, wherein the retaining projection and the locking lever of the operation tool project in the same direction. A frame of an underground structure and a lid attached to the frame so as to be openable and closable. A cylindrical hole is formed on a surface of the lid, and a shaft hole is formed at the bottom of the cylindrical hole. An operation shaft is rotatably inserted into the hole, a locking tool is fixed to the back side of the lid on the operation shaft, a locking lever is projected from the locking tool, and the operation shaft is rotated to rotate the operation shaft. In a lid locking device for an underground structure capable of latching a latching lever on the frame body or releasing the latching, a support flange is provided on the inner wall surface of the frame body, and A locking projection is provided on the locking tool, and a lower end circumferential end surface of the locking projection contacts the support flange when the operation shaft rotates, and a lower circumferential end surface of the locking projection is the locking lever. A ground characterized by being inclined downward toward the locking direction Lid locking device of a structure. The locking device for a lid of an underground structure according to claim 1 or 2, wherein a stopper is provided on the back side of the lid, a locking projection is provided on the locking tool, and the locking shaft is rotated to rotate the locking shaft. A locking device for a lid of an underground structure, wherein the locking projection is protruded in a direction opposite to the locking lever with respect to the operation shaft. 5. The lid locking device for an underground structure according to claim 4, wherein a notch portion of an inward flange in the cylindrical hole is provided so that the operation tool cannot be removed when the locking projection comes into contact with the stopper. A locking device for a lid of an underground structure characterized by being provided. The lid locking device for an underground structure according to claim 3, wherein a stopper is provided on the back side of the lid body, a locking protrusion is provided on the locking tool, and the locking protrusion is formed by rotating the operation shaft. A locking device for a lid of an underground structure, wherein the locking projection is protruded in a direction opposite to the locking lever with respect to the operation shaft. The lid locking device for an underground structure according to claim 4 or 6, characterized in that when the locking projection comes into contact with the stopper, the downward slope of the locking projection is located at the lowest position. Locking device for lids of underground structures. 8. The underground locking device for an underground structure according to claim 1, wherein a protective cover is provided on the back side of the lid, and the protective cover covers the locking lever. Lock device for the lid of things.

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